Bug 15811: follow-up Bug 4912: Redirect to the appropriate view after editing/deleting a list

Test plan:
1/ At the opac, go on the the list home page (opac-shelves.pl)
2/ Click on 'new list', create a list and save
=> You should be redirect to the list
3/ Click on edit, save
=> You should be redirect to the list
4/ Delete the list
=> You should be redirect to the list
5/ Edit a list from the list view, save
=> You should be redirect to the list
6/ Click on a list link (op=view)
7/ Edit the list, save
=> You should be redirect to the 'show' view
8/ Delete list
=> You should be redirect to the list

Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
Works as advertised

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>

Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com

koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-shelves.tt

@@ -499,6 +499,7 @@
                                         <span class="sep">|</span>
                                         <form method="get" action="/cgi-bin/koha/opac-shelves.pl" class="form-inline">
                                             <input type="hidden" name="op" value="edit_form" />
+                                            <input type="hidden" name="referer" value="view" />
                                             <input type="hidden" name="category" value="category" />
                                             <input type="hidden" name="shelfnumber" value="[% shelf.shelfnumber | html %]" />
                                             <input type="submit" class="editshelf" value="Edit list" />

opac/opac-shelves.pl

@@ -90,11 +90,11 @@ if ( $op eq 'add_form' ) {
             push @messages, { type => 'error', code => 'error_on_insert' };
         } else {
             push @messages, { type => 'message', code => 'success_on_insert' };
-            $op = $referer;
+            $op = 'view';
         }
     } else {
         push @messages, { type => 'error', code => 'unauthorized_on_insert' };
-        $op = $referer;
+        $op = 'list';
     }
 } elsif ( $op eq 'edit' ) {
     $shelfnumber = $query->param('shelfnumber');